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@Q /fm N PETERS, PHOTO-LITHOGRAFHER, WASHINGTON D C @eine i gratte latrat i @Hita canne' GADWELL, or WAUKEGAN, ILLINois. Letters .Patent No. 65,056, elated May 28, 1867.

IMPROVEMENT IN STEAM ENGINES.

TO ALL WHOM II MAY ONGER'N:

Be it known that I, CALEB CADWELL, et Waukegan, in the county of Lahe, and the State of Illinois, have invented a new and useful Improvement in Steam Generators; and I do hereby declare that` the following is a full, clear, and exact description of the construction and operation of the saine, reference being had to the accompanying drawings, and letters of reference marked thereon, making a part of this description, in which- Figure l is a plan view of my generator.v

Figure 2, a section taken vertically through fig. 1, showing the cylinder and {ire-box.

Figure 3, an elevation of a part of the end of thegencrator furthcrest from the cylinder.

Figure 4, an elevation of a portion of the wat er pipe and pninp, with the face plate and the valve of the latter removed. v i i Figure 5, a perspective representation et' the pump-valve and shaft.

The nature of nay-invention consists, first, in the use of a hollow revolving cylinder placed in the upper part of the fire-box, and arranged te receivea suitable supply of water at one end, and discharge steam inte the pistonlcylinder vat the other; second, in the use of a peculiarly arranged pump, consisting of a cylinder made to-'turn in a suitable metallic steelt, and having chambers made in the inner end corresponding with receiving pipes made in the stock, with which said chambers communicate and receive a suilicient supply of water for generating steam in' the revolving cylinder; third, thus providing for retaining theheat, and 'sustaining an even temperature in the fire-box; fourth, the arrangement of a double engine having a vertical central valve operated b a suitable cam or rod'for cansinosteam to ress alterhatel against the o iosite ends of the Jistons.

Y D P Y n Pl l By this general construction a steam generator and motive power is provided, which is simple, cheap, and efficient, and can he run with much less fuel than those'in common use, as the water strikes the inside of a revolving cylinder, by which means the superheated steam is kept at a more even temperature than when generated in aiixed boiler. And as to the pump, it is constructed to supply the generator without the usual force employed for such a purpose. The whole being arranged with a view of meeting the wants of those desir- Aing a motive power either stationary or'p'ortable, which is strong, compact, powerful, and substantial.

In order to give a corrcct'understanding of my device I have ma-rlzed corresponding parts with the same let-tersyand will nowgvc a-detailed description. I l

A D, figs. 1 and 2, represent the lire-box, which may be made of iron, or in part of hriel. The drawings, however, show the box constructed of iron, and clamped together at B, fig. 2, the top at fig. 1 being removed to show the cylinder C. E F, fw. I, show' the ends of the.1e.box, which are made strong enough to support the weight of cylinder C. This cylinder is hung in hre-box A D, at such a point as to nia-lie a narrow throat at the top, as seen at iig. 2, for the'purpose of concentrating the heat at a place where it is generally the least intense. The cylinder C is hollow, as seen in iig. 2, and has a pipe, G, communicating'with hollow bearing II, and cylinder C., fig. 1, for the purpose of conducting water from pump'M to the generator C. I also shows a hollow bearing of cylinder C, coinrnunicating'with steam pipes .I K, and piston cylinder L. It will be seen from this description that the hollow hearings II I revolve, while thc pipes G J are stationary, and that the joints should be made steam-tight." i' a', iig. 1, show holes communicating with openings N N, lig. 4, through which water passesinto the chambers P I), Iig. 5, of valve 2. Q shows a shaft loosely iitted into the valve ,2., in order-,that the same when worn may adjust itself. And to make the valve'2 turn,.a pin is put through the back end of the shaft and fitted inte depressions 'made in the back of the valve, and covered with a suitable packing held in position 'by means of a holt or nut. This shaft is made to pass through hole Y, fig. 4,. and also through the support Z, fig'..1, which has a suitable opening for allowing a connecting-rod, 9, or other suitable device, te! be attached to and turn said shaft, ,far enough to empty the water from chambers P into a discharge pipe, not shown in consequence of its being a common arrangement and well understood. Itwill be seen from this description that the valve"2 has a reciprocating motion, but should the generator require a greater supply of water it can be furnished by giving the .valve a rotary motion, in which ease only one supply aperture will be required. The ea'p W, fig. I, may he made without a recess over the outside of the valve 2, and may have a 'screw inserted for holding the valve 2 against its seat, or there may be an opening communicatingwlth any suitable discharge pipe to allow the steam to press against the back ofthe valve and hold it in place. A reservoir may be arranged over the openings r, lig. l, through which the steam should he allowed to pass and he discharged into the smoke-stack. The supply of water entering,r the pump should be regulated by a stop-cock in the pipel-leading from thc reservoir to the pump. shows a set-screw put through the substantial iron frame 4, and used for and'in conjunction with safety-lever 5in keeping the pipes lGr and J steam-tight, and

yet allow an ovebprcssure of steam to escape between pipe .l and hollow hearing I. The above arrangement' in pump may he used to inject air into the generator, by making the valve larger, and moving it slowly enough to allow the air to expand before the valve moves past the openings N N O, lig. 4. As to the engine, I use a double cylinder, L, without heads, having two pistons, operating rods 9 attached to a reciprocating metallic frame 7, and having a cylindrical valve (i, figs. 1 and 3, operating between said pistons. The valve 6 is shown more clearly atB X, drawing B, and is made hollow, and has-a partition, 10, at the centre, as seen in saine drawing, and also has the upright elongated openings 1l, for allowing the steam to alternately enter and pass out of the two divisions of the double cylinder L. The valve 6 is made to turn and accomplish the above result by means of rod 12, attached to frame 7, but may be worked by a cani attached to balance-wheel S, lig. 1. The object being, to turn the valve 6 from a point as near as possible from the end of the stroke, 13 and 14 represent clamps attached to the eylinderbed 15, and used in combination with set-screws 16 and 17 for regulating the valve 6, andlpipe K T shows cog-wheel which is driven by lpinion U, rigidly attached to shaft lV, having suitablebearings iu E and F. It will bo seen from this description that wheel '1l causes cylinder C to revolve, and shaft V to work the punip-valvc 2 by means of connecting-rod, ,in A small pipe may be inserted through opening made for water and air to go in at, the end of which should reach near the surface of" the generator C, and have a faucet on the outsidefor drawing oil any surplus water which may chance to accumulate. There should be a thrott1e-valve and a. clutch arranged to cut olf the steam and stop the machinery, while the generator is allowed to revolve slowly, and not stop while the re is up.

Having thus fully described my device, what I claim, and desire 'to Secure by Letters Patent, is- 1. The double piston cylinder L, without heads, and having the valve 6 constructed and arranged with reference thereto substantially as described.

2. The punipwalve 2,' having:r thc shaft Q attached and operated as described and set forth.

OALEB CADWELL.

Witnesses:

GEO. L. CHAPIN, 3. R. Hmmm). 

